We have an existing network with OSPF configured between 3750's (DR and BDR) this is working fine.But the Nexus 7k which has been configured to run OSPF, won't established the adj. It is in the same network/subnet.The MTU is 1500.
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our backbone (6509) is connected to atm backbone (nortel passport) those are connected through giga Ethernet interface and running ospf in area 0. One week ago we lost the ip connectivity between those backbones, the interfaces were in up but the neighbor relation fail and it was kept in LOADING STATE, according we the logs the neighbor relation fail because a BAD LSA was received (error messages %OSPF-4-ERRRCV:Bad LSU adv and %OSPF-4-BADLSATYPE:Invalid lsa:Bad LSA chksum Type 5 were received during the outage)We check in cisco and this is quite normal behavior if we receive a bad LSA but the customer is asking why we have the same error message for long time and we didn't lost the neighbor relationship.
how many bad lsa we can receive before to lost the neighbor relationship.We receive two errors messages for bag lsa.. [code]
I config my E0/0 Interface with "ip ospf network non-broadcast" command, I want this interface to use uni cast to hello neighbor.
As I issue "neighbor x.x.x.x" under ospf process, it told me that: OSPF: Neighbor command is allowed only on NBMA and point-to-multipoint networks. I am sure that there are no any typo, and show ip ospf interface e0/0 says it's been an NBMA interface, so what's wrong with this router?
IOS information:
(C3620-J1S3-M), Version 12.3(18), RELEASE SOFTWARE (fc3)
I am working at a client site today on a routing issue. I am currently working on an issue where a 3750 switch running EIGRP will not update its neighbor router when a network statement is added to the eigrp instance.The neighbor is a 3825 router.
Both the switch and the router have a common network which is 192.168.36.0/24.
Both the switch and the router are in a neighbor adjacency.
Both boxes have "no auto-summ" in the routing configuration instance.
I can run debugs on both routers (debug eigrp packets) and then I can watch queries and updates when I issue "auto-summ" or "no auto-summ". Also I see a "graceful restart" for the peers when this is done.I had an expectation that when I added the network (this is just an arbitrary network for testing, which is 172.16.69.0/24). I wanted to watch this network being sent in an update to the neighbor router.When I add the above mentioned network, there are no updates packets sent from the 3750 to the 3845. I have not had success to this point trying to resolve. I have followed the Cisco document "Troubleshooting EIGRP Flow Chart", but have exhausted all it has to offer and now it is at the point where it is telling me to contact TAC.
We are currently running ISIS and recently we have purchased 2 WS-C3750X-24. Unfortunately 3750 do not support ISIS and we have decide to use redistribution between ISIS and OSPF. We are using Stack feature so consider 3750 as one chassis.
Router A and Router B are ISIS neighbors. As first step we have setup redistribution between Router A and Switch 3750
Router A Configuration router isis
net 49.0000.0000.0000.0001.00
metric-style wide
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Switch 3750 Configuration
router ospf 1
router-id 192.168.2.1
passive-interface Vlan3
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From Router's A routing table we see the ospf routes life is good Switch routing table has E2 - OSPF external type 2 routes and is reachable from the rest of the network.
Router A #show ip route ospf 1 Gateway of last resort is not set O192.168.10.64/27 [110/2] via 172.17.1.3, 2d01h, GigabitEthernet1/20 [110/2] via 172.17.1.1, 2d00h, GigabitEthernet1/19
When we bring up the ospf adjacency with Router B the whole ISIS routes are replaced with E2 - OSPF external type 2 which is not desirable.
Router B Configuration
router isis
net 49.0000.0000.0002.00
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I just want to know how many ospf routes a catalyst 3740 support ?The cisco doc or datasheets doesn't answer this clearly. Because there is only a statement "unicast routes"!? Does this means all unicast routes (eigrp, ospf....static)If so, there is a statement for about 10k routes ?
View 3 Replies View RelatedWe have a 14 offfice MPLS network. All offices have Cisco 3750s running OSPF which replicate route tables via our providers BGP peers. I am introducing a new network in our SF office which is not directly connected so in SF we have a static route "ip route 172.16.20.0 255.255.255.0 192.168.100.1. I want our other offices to learn this route route via OSPF so that they know how to get to the new network. My problem is that of course remote sites do not see our static routes and i have tried to add this via ospf but the switch will not propagate this route because it is not directly connected to the switch in SF.
router ospf 1
log-adjacency-changes
network 10.2.0.0 0.0.0.255 area 2.2.2.2
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I believe the answer is yes, but incorperating more layer 3 features of our 3750's, I want to know if they fully support EIGRP or OSPF?
Also for a small business of 4 locations, each with a 10mbps fiber and a 1.5mbps mpls... wouldn't you say EIGRP would be easier? Want to look at making the failover automatic if the 10mbps fiber goes down between a site, then the network fails over to 1.5mbps mpls. When the fiber returns in service then the network automatically preferr the fiber again.
Currently we use static routes and if there is a provider outage we have to manually edit the config to flip flop the routes.
I have 2 ASBR routers, AGFR01RTR03 and AGFR02RTR03, performing OSPF to OSPF redistribution in both ways for the same ***. They also do summarization for our private addressing scheme. It is all working just fine for that part (neighbors, summarization, redistribution).
AGDC01RTR01 --- AGDC02RTR01 (OSPF 1000 ABRs)
| |
| |
AGFR01RTR03 --- AGFR02RTR03 (OSPF 1000 / 53 ASBRs)
Let's focus on AGDC01RTR01 with a specific entry here (IP subnet is fake) :
Routing entry for 1.1.1.0/25
Known via "ospf 1000", distance 110, metric 300, type inter area
Last update from 10.2.244.76 on GigabitEthernet5/1, 1d03h ago
Routing Descriptor Blocks:
* 10.2.244.76, from 10.2.1.249, 1d03h ago, via GigabitEthernet5/1
Route metric is 300, traffic share count is 1
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Currently the OSPF network consist of 2 segment route via static route.One is AREA 0 and another AREA 10.Both network are seperate entity, only static route to route between 2 networks.But the static route do not provide the dynamically and flexibility, I plan to run routing between 2 networks via VLAN160 and VLAN162.
I still want to manitnace it was 2 different OSPFrouting domain.Can I run OSPF with differrent OSPF porcess ID?
I renamed my SSID to "CoolWifiName" so that it's not the router's generic name, but what if a neighbor in my building uses that same name and uses it as their SSID? Since I wouldn't know which is which, and I mistakenly try to type in my wifi password on their's, would they have access to my password and be able to capture it?
View 3 Replies View RelatedSometimes my wireless connection goes away.It just started doing this the last 2 months. I have to get next to my router in order for it to come back. My name will be in the list and so is my neighbors.
View 2 Replies View RelatedI am running IPv4 with OSPFv2 currently. However, I planed to deploy IPv6 in my network. Is it possible to deploy V6 with OSPFv3 without affecting current network traffic in V4?
View 7 Replies View RelatedI have a neighbor, whom I barely know, (don't know his name even) ask if I would be willing to give him the number off of my modem so he can cannot wireless to my internet. I believe that is a bad idea. For one I don't know him but if it was possible and I did that, would he be able to access my account? or start more trouble? He at first said If I give him the numbers off of my router but then I stopped him because I have a modem not a router. So I would never let him but was curious if someone can tap into a signal of mine from a laptop next door to me using wireless signal? And if so can that person see all of my stuff? Would my computer and I be at risk?
View 5 Replies View RelatedI'm having problems with a linux box we're using as a VPN/IPtables firewall. The setup is such that we're sitting this thing behind a basic Comcast cable modem will all the pass through options set. The outside facing interface is set to DHCP and grabs an IP address from Comcast. Inside interface is statically set with the same being said for the CIPE interface. The inside interface works until we plug up the outside. When we plug up the outside interface, all network traffic to the box effectively shuts down and the /var/log/messages is flooded with "neighbor table overflow" messages. Sometimes, this takes a few seconds to appear, and when that happens I can track some traffic hitting the far side of the tunnel, I.E. it works for a few fleeting seconds.
View 6 Replies View RelatedI have a wireless PC laptop and a router that works fine. When I change rooms, there's competition from my neighbor's router and I want to remove it. When I "view wireless networks" I see their connection. When I go to "change the order of preferred networks" (hoping to delete it from there) it doesn't show up. If I go to "change advanced settings" I end up in the same place not showing the neighbor's wireless.
View 4 Replies View RelatedMy friend has an internet connection and Wifi, it reaches my room but with poor signal, is there any way I can strengthen up the signal?
View 1 Replies View RelatedI have 2 ASR routers running PIM-SM between them on several sub interfaces.PIM hello interval configured for 200ms.Sometimes PIM neighbors between ASR routers going down.
Reboot for each router not resolving the problem.Deleting ip pim sparse-mode and configuring it again on one of the ASR routers resolves the problem.
I didn't find any related bug.The version is asr1000rp1-adventerprisek9.03.06.01.S.152-2.S1.bin
We are about to a large amount of access points from access ports to trunks. Is there a report function in NCS that will give me a list of the APs and their CDP neighbor? I am able to view the information under "monitor/devices/access points" but I can't export that information to a useable format.
When I get the list the next step will be to create a configuration task in LMS 4.2 to configure the switch ports.
All is functioning but I can't connect to my roommates' wireless router.BUT I am able to connect to my neighbors' unsecured network without a problem. I also have a laptop that connects without a problem to it. The network is secured and I am definitely providing the correct network key/password. I compared the network settings on my desktop with the ones on my laptop and its the same.
View 1 Replies View RelatedHow can I receive the Internet of my neighbors internet with a wireless router and how far will it Carry?
View 1 Replies View RelatedI have a 3825 running c3825-advipservicesk9-mz.124-24.T8. It is configured as an eigrp stub advertising only its connected and static routes. There are three WAN connections using a metro ethernet service. Two are data, one for voice traffic. The primary data connections run to two WAN edge ASR1002 routers.
The primary data connection (Gi0/1.943) is 20 Megs, the secondary data connection (Gi0/1.944) is only 15 Megs. Before the secondary connection was in place I only had routes to our backbone via Gi0/1.943 and everything was working great. Some time after the secondary data connection was turned up the routes to the backbone through Gi0/1.943 disappeared from the eigrp topology table causing all data traffic to flow through the less desirable secondary Gi0/1.944 interface to our backbone.
There is a good eigrp neighbor relationship between the 3825 and the ASR connected to Gi0/1.943, but if I show ip protocols it does not list the ASR as a data source. I know that the ASR is advertising its routes because I can see the updates coming from it if I debug ip eigrp. For some reason they are just not being added to the topology table by the 3825, not even as a feasible successor.
I have shut/no shut the interface multiple times at both ends during troubleshooting and I also reloaded and upgraded the code on the 3825 from 12.4(24)T to 12.4(24)T8. We also contacted the metro ethernet carrier to see if they had a policy that could potentially be blocking the traffic (no). My colleagues and I are just not seeing any feasible reason why these routes are not being added.
i have switch 2960 POE connected to access point WiFi Cisco when we connect the AP you can see it in the neighbor after 2 minute all AP disappear?
View 1 Replies View RelatedI was called into look at a customers's site that was upgraded by another vendor. They were complaining about packet loss and performance issues. I discovered they had changed from static routing and turned on EIGRP (100) and the EIGRP neighbors are not on a common subnet, they used secondary IP addressing to connect two 4506 switches to the core router. Correct me if I'm wrong, but won't this cause the neighbors to bounce and cause the degraded network performance? Don't we need to have a single common subnet for this to work? Either that or they have bridged the VLANs somehow? There is also a cable connecting the 4506 switches besides the uplink to the core router.
4506#1
May 17 21:28:55.443: EIGRP-IPv4(100): Neighbor 192.168.120.1 not on common subnet for Vlan1
May 17 21:29:05.848: EIGRP-IPv4(100): Neighbor 10.102.10.10 not on common subnet for Vlan20
May 17 21:29:17.327: EIGRP-IPv4(100): Neighbor 206.78.xxx.xx not on common subnet for Vlan20
May 17 21:29:48.291: EIGRP-IPv4(100): Neighbor 206.78.xxx.x not on common subnet for Vlan30
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We use our internet to watch Netflix. We have had no problems until recently, I called the satellite Internet company(which is a local co.) they told me my router was going out. I bought a new one, problem solved! Right?!? WRONG my husband told me my neighbor just got Internet and has been playing Xbox everyday which coincidently is between the 5:30pm to 10ish pm we have been having issues with our router. What can we do to fix this? Do I have to buy a bigger router? He is not stealing off mine because it is password protected that was changed when new router was setup and programmed. I have been running of a Cisco Linksys E2500 advanced dual band n router. The router is in the same room as the TV accessing it, which we previously had no issue connecting anywhere in the house or garage.
View 1 Replies View RelatedI have a collapsed core design with routed ports between all components. Access layer switches, data center switches, core/aggregation. All routed (no spanning-tree at all).Now...I have to add an IBM BladeCenter with a BNT layer 3 switch to my topology. However, those nasties don't seem to support routed ports.How can I have a routed port on my cisco switch and a standard access port on the BNT and still establish an adjacency with an SVI? I am running OSPF, but I am labbing this in my home lab with 2 x 3550s and EIGRP.
On SW2:
*Mar 1 00:57:00.711: EIGRP: Received HELLO on Vlan100 nbr 10.1.1.1
*Mar 1 00:57:00.711: AS 999, Flags 0x0, Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
*Mar 1 00:57:02.303: EIGRP: Sending UPDATE on Vlan100 nbr 10.1.1.1, retry 9, RTO 5000 tid 0
*Mar 1 00:57:02.303: AS 999, Flags 0x1, Seq 17/0 interfaceQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/1
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this might sound straight forward, but every other pc or console can find and connect to my router.This issue seems to happen about once every few months, sometimes it comes back by itself and reconnects completely fine.
There isn't a "user limit" on our router.Wireless adapter is dell wireless 1505 draft 802.11n wlan mini-card.
Have restarted PC and uninstalled and reinstalled the card.I tried to set the i.p address to static but it says "adapter disconnected" so won't allow me to edit any settings, despite it being able to find neighbour's wireless very easily.
I have a 851 that I'm trying to apply CBAC on. However, it seems that new sessions are stuck in SIS_OPENING. I'm guessing maybe because packets are not returned,I can't understand why - everything works just fine up-until I add ip inspect INBOUND out' on the WAN-interface.
View 19 Replies View RelatedIm trying to upgrade my IOS. It wasnt at ROMMON before but I thought I can upload the IOS on the xmodem so i did a
en
conf t
config 0x0
reset / reload
Now that I am in the ROMMON. If i type CONFREG to change the BAUD, nothing shows up. Usually it gives options but this time, nothing.
>confreg
>
So I tried to go back to the normal CLI
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I turned on the router manually and turn it back on hoping that it will work but it brought me back to rommon.
Do I need the Universal image to perform stftp on a 3750 or 3750-X?
View 8 Replies View Relatedwhy a subnet wouldn't be passed on to just one participating OSPF device?
I have two routers and an ASA, all of which are in area 0, it's a pretty simple config. The two routers are connected to some other devices (also in area 0) that pass of an external route to a particular subnet, let's call it 192.168.4.0. The routers are getting it just fine, but the ASA is not:
What if i run ospf in all of the routers in network diagram ? does it caus loops ? if so how to prevent it ?
View 8 Replies View RelatedI'm at my girlfriend's house and every laptop in the house works beside hers! I tried mine and it connects flawlessly also my itouch and my eee-pc also connect without any trouble but her laptop is stuck on Identifying i tried the whole netsh reset thing and sadly we cannot have access to her router as her dad hates it when we play in his Linux based stuff anyways any simple fix would be welcome, i hope no one will suggest changing routers/reinstalling the whole OS[CODE]
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